TY - JOUR
T1 - Microstructure-based cleavage modelling to study grain size refinement and simulated heat affected zones of S690 high strength steel
AU - Jiang, Quanxin
AU - Bertolo, Virgínia M.
AU - Popovich, Vera
AU - Sietsma, Jilt
AU - Walters, Carey L.
PY - 2023
Y1 - 2023
N2 - Study of the cleavage behavior of heat treated S690 steel by a microstructure-based approach combined with finite element analysis is present in this paper. Cleavage simulations of steels subjected to heat treatments that cause grain refinement or simulate heat affected zones are performed, and are compared with experiments. It is found that the experimental improvement of toughness from grain refinement is 80% of what would be expected based on the model. The 20% difference is due to the lower number fraction of high-angle misorientation boundaries. It is also found that the resistance to micro-crack propagation is more effective in heat affected zones, which can be explained by the residual compressive stress in martensite-austenite constituents. This research assesses the balance between microstructural parameters for controlling cleavage toughness.
AB - Study of the cleavage behavior of heat treated S690 steel by a microstructure-based approach combined with finite element analysis is present in this paper. Cleavage simulations of steels subjected to heat treatments that cause grain refinement or simulate heat affected zones are performed, and are compared with experiments. It is found that the experimental improvement of toughness from grain refinement is 80% of what would be expected based on the model. The 20% difference is due to the lower number fraction of high-angle misorientation boundaries. It is also found that the resistance to micro-crack propagation is more effective in heat affected zones, which can be explained by the residual compressive stress in martensite-austenite constituents. This research assesses the balance between microstructural parameters for controlling cleavage toughness.
KW - Cleavage
KW - Grain refinement
KW - HAZ
KW - Local approach to fracture
KW - Multi-barrier modelling
UR - http://www.scopus.com/inward/record.url?scp=85159551594&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2023.145184
DO - 10.1016/j.msea.2023.145184
M3 - Article
AN - SCOPUS:85159551594
VL - 876
JO - Materials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing
JF - Materials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing
SN - 0921-5093
M1 - 145184
ER -